Ulmus parvifolia 'Emer II'

Ulmus parvifolia 'Emer II'

Infobox Cultivar | name = "Ulmus parvifolia"
cultivar = 'Emer II' or 'Emerald Vase' Allee™
origin = USAThe Chinese Elm "Ulmus parvifolia" Jacq. cultivar 'Emer II' yclept 'Emerald Vase' (Allee™) was cloned from a tree planted circa 1910 on the University of Georgia campus at Athens.

Description

The tree can reach a height of about 15 m, with a more upright crown shape than 'Emer I', (Athena™), its spread approximately 13 m, with arching branches bearing medium green, glossy leaves turning orange to rust red in autumn. The exfoliating, mottled bark has a puzzle-like pattern, and is considered outstandingly attractive Santamour, F. S., & Bentz, S. E. Updated checklist of elm (Ulmus) cultivars for use in North America. "Journal of Arboriculture", 21(3): May, 1995. ] .

Pests and diseases

The species and its cultivars are highly resistant, but not immune, to Dutch elm disease, and unaffected by the Elm Leaf Beetle "Xanthogaleruca luteola" [http://www.sunshinenursery.com/survey.htm] .

Cultivation

The tree is reputedly drought tolerant, but in the elm trials [http://www.for.nau.edu/cms/content/view/512/706/] conducted by Northern Arizona University at Holbrook, Arizona, 'Emer II' (Allee™) proved unsuited to the hot, arid climate and sustained over 50% mortality in its first year, as did its sibling 'Emer I' (Athena™). The tree is currently being evaluated in the National Elm Trial [http://treehealth.agsci.colostate.edu/research/nationalelmtrial/NET_Cultivars.htm] coordinated by Colorado State University. 'Emer II' is not known to have been introduced to Europe or Australasia.

Accessions

;North America
*Bartlett Tree Experts, North Carolina acc. no. 2001-166
*Holden Arboretum acc. no. 98-26
*Scott Arboretum acc. no. 2000-006
*Smith College acc. nos 302, 33603

Nurseries

;North America(Widely available);Australasia
*Fleming's Nursery [http://www.flemings.com.au/] , Monbulk, Victoria, Australia.

References

External links

*http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/trees-new/cultivars/ulmus_parvifolia.htm "Ulmus parvifolia" cultivar list.
*http://fletcher.ces.state.nc.us/programs/nursery/metria/metria11/warren/elm.htm Return of the Elm - the status of elms in the nursery industry in 2000. Warren, K., J. Frank Schmidt and Co.


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